On 10 June 2015 at 12:47, Norbert Lange wrote: > if you mean vtable gets altered you mean the pointer is directed to > another vtable? Yes. I should have said the vptr is altered, to refer to a different vtable. What I mean by "there's only one vtable" is that an object has a single vptr, to a single vtable. Which vtable it points to depends on what stage of its lifetime it is at. During construction of the Base sub-object the object will somewhat look like this: &VTableBase [members of Base] [uninitialized storage for members of Derived] then when the Derived constructor runs it looks like this: &VTableDerived [members of Base] [members of Derived] After ~Derived() completes: &VTableBase [members of Base] [uninitialized storage for members of Derived] and after ~Base() completes the object is no more.
